/Engine/Source/Runtime/Engine/Classes/GameFramework/RootMotionSource.h
Accumulates contributions for velocity into InOutVelocity for a given type of root motion from this group
void AccumulateRootMotionVelocity ( ERootMotionAccumulateMode RootMotionType, float DeltaTime, const [ACharacter](API\Runtime\Engine\GameFramework\ACharacter) & Character, const [UCharacterMovementComponent](API\Runtime\Engine\GameFramework\UCharacterMovementComponent) & MoveComponent, FVector & InOutVelocity ) const